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| 1. | It confirms other evidence that the earth's surface temperature has remained approximately constant during |
| 它证实了另一个现象，在此期间，地球表面的温度几乎保持不变。 |
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| 2. | people come and go, but the population of this town has remained approximately constant for the past |
| 这个城市的人口已达八百万。 |
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